Sterlco 140 to 6,285 Gallon Pump Tanks - Manual (Page 7)

Pump Tanks Chapter 2: Functional Description 7 of 36
Chapter 2: Functional Description
2-1 Models Covered in This Manual
This manual covers many models of cooling tower pump tanks and chilled water pump tanks
with operating capacities of 100 to 6,125 gallons (378 to 23,183 liters). Pump tanks are
designed, specified, and engineered to meet the needs of the process specified at the time of
purchase. Model numbers are listed on the serial tag.
Model numbers start with a CT or CW to describe cooling tower or chilled water tank
configurations. The number following is the approximate capacity up to the overflow of the
tank well(s) and a D at the end indicates a dual well configuration. Additional numbers are
added to signify pump horsepower. For example, a CT1600D-20-20-10 pump tank is a
cooling tower tank, 1,615 gallon (6,113 liter) capacity to its overflow, has dual wells, a 20 hp
process pump, a 20 hp dual standby pump and a 10 hp recirculation pump.
A model number followed by –Q is specially-constructed, and the information in this manual
may not apply. Make sure you know the model and serial number of your equipment before
contacting the manufacturer for parts or service.
2-2 General Description
Single well pump tanks are reservoirs for chilled water and tower cooling water processes.
Process pump(s) deliver water through the chiller or cooling tower as well as through the
process. Dual well tanks have re-circulation pump(s) to deliver water from the hot side to the
chiller or tower. The water then returns to the cold side, where process pump(s) deliver
cooled water directly to process.
Standby pumps may be used as backups for both process and re-circulation during service or
maintenance procedures. Manifolding options provide ease of connection to process and can
ease the transition to standby pumps.